The Patriot Act that was passed after 9/11 DOES indeed give the government the power to use wire-taps WITHOUT a court order!
Read the patriot act. If it involves an investigation of foreign terrorist a court order will not be needed, a court order is still need for US citizens, and other possible crimes. Foreign drug dealers, mafia, still need a court order. You see lets say terrorist A comes into the country and talks about his plans about blowing up a chemical plant in Iowa with terrorist B. The Feds want to tap terrorist A&B cell phones. When you get a court order it goes by the phone # not the person. Al Qaeda knows this so what they do is phone flip. I call you on one cell phone # to your cell phone, then you get different phone and call me back, then I get different phone an call you back and so on and so on. pre-paid phones and Caller ID (So you don't have to even say the phone # your calling from) makes it easy. An Agent could simply tail the terrorist and intercept the cell calls with equipment you can get at Radio Shack but instead he has to know the phone #, get a court order, when the number changes he has to stop listening/ recording, find out what the new number is, get a court order, when the number changes he has to stop listening/recording. That bomb goes off because Bubba does want to have his call listened to.
Same thing with the gun show story...Do you think they will ban all guns if that happens...Columbine already happen and I see no ban?? Current firearms laws would prevent it from happening foreign Terrorist should not be able to buy guns at a gun show because they are not US citizens, and a background check should be completed. Some guys follow the rules at guns shows and some guy look the other way and bend rules....that makes us all look bad.